%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1995
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
%
\section[Desugar]{@deSugar@: the main function}
\begin{code}
#include "HsVersions.h"
-module Desugar (
- deSugar,
-
- -- and to make the interface self-sufficient...
- SplitUniqSupply, Binds, Expr, Id, TypecheckedPat,
- CoreBinding, GlobalSwitch, SwitchResult,
- Bag, DsMatchContext, DsMatchKind
- ) where
-
-
-import AbsSyn -- the stuff being desugared
-import PlainCore -- the output of desugaring;
- -- importing this module also gets all the
- -- CoreSyn utility functions
-import DsMonad -- the monadery used in the desugarer
-
-import Bag ( unionBags, Bag )
-import CmdLineOpts ( switchIsOn, GlobalSwitch(..), SwitchResult )
+module Desugar ( deSugar, pprDsWarnings
+#if __GLASGOW_HASKELL__ < 200
+ , DsMatchContext
+#endif
+ ) where
+
+IMP_Ubiq(){-uitous-}
+
+import CmdLineOpts ( opt_D_dump_ds )
+import HsSyn ( HsBinds, HsExpr, MonoBinds,
+ SYN_IE(RecFlag), nonRecursive, recursive
+ )
+import TcHsSyn ( SYN_IE(TypecheckedMonoBinds), SYN_IE(TypecheckedHsExpr)
+ )
+import CoreSyn
+import PprCore ( pprCoreBindings )
+import Name ( isExported )
+import DsMonad
+import DsBinds ( dsMonoBinds )
+import DsUtils
+
+import Bag ( unionBags, isEmptyBag )
+import BasicTypes ( SYN_IE(Module) )
+import CmdLineOpts ( opt_DoCoreLinting, opt_SccGroup, opt_SccProfilingOn )
+import CostCentre ( IsCafCC(..), mkAutoCC )
import CoreLift ( liftCoreBindings )
import CoreLint ( lintCoreBindings )
-import DsBinds ( dsBinds, dsInstBinds )
-import IdEnv
-import Pretty ( PprStyle(..) )
-import SplitUniq
-import Util
+import Id ( nullIdEnv, mkIdEnv, idType,
+ SYN_IE(DictVar), GenId, SYN_IE(Id) )
+import ErrUtils ( dumpIfSet, doIfSet )
+import Outputable ( PprStyle(..), pprDumpStyle, pprErrorsStyle, printErrs )
+import Pretty ( Doc )
+import UniqSupply ( splitUniqSupply, UniqSupply )
\end{code}
-The only trick here is to get the @DesugarMonad@ stuff off to a good
+The only trick here is to get the @DsMonad@ stuff off to a good
start.
\begin{code}
-deSugar :: SplitUniqSupply -- name supply
- -> (GlobalSwitch->SwitchResult) -- switch looker upper
- -> FAST_STRING -- module name
-
- -> (TypecheckedBinds, -- input: class, instance, and value
- TypecheckedBinds, -- bindings; see "tcModule" (which produces
- TypecheckedBinds, -- them)
- [(Inst, TypecheckedExpr)])
--- ToDo: handling of const_inst thingies is certainly WRONG ***************************
+deSugar :: UniqSupply -- name supply
+ -> Module -- module name
+ -> TypecheckedMonoBinds
+ -> IO [CoreBinding] -- output
- -> ([PlainCoreBinding], -- output
- Bag DsMatchContext) -- Shadowing complaints
-
-deSugar us sw_chkr mod_name (clas_binds, inst_binds, val_binds, const_inst_pairs)
+deSugar us mod_name all_binds
= let
- (us0, us0a) = splitUniqSupply us
- (us1, us1a) = splitUniqSupply us0a
- (us2, us2a) = splitUniqSupply us1a
- (us3, us4) = splitUniqSupply us2a
-
- ((core_const_prs, consts_pairs), shadows1)
- = initDs us0 nullIdEnv sw_chkr mod_name (dsInstBinds [] const_inst_pairs)
+ (us1, us2) = splitUniqSupply us
- consts_env = mkIdEnv consts_pairs
+ module_and_group = (mod_name, grp_name)
+ grp_name = case opt_SccGroup of
+ Just xx -> _PK_ xx
+ Nothing -> mod_name -- default: module name
- (core_clas_binds, shadows2)
- = initDs us1 consts_env sw_chkr mod_name (dsBinds clas_binds)
- core_clas_prs = pairsFromCoreBinds core_clas_binds
-
- (core_inst_binds, shadows3)
- = initDs us2 consts_env sw_chkr mod_name (dsBinds inst_binds)
- core_inst_prs = pairsFromCoreBinds core_inst_binds
-
- (core_val_binds, shadows4)
- = initDs us3 consts_env sw_chkr mod_name (dsBinds val_binds)
- core_val_pairs = pairsFromCoreBinds core_val_binds
+ (core_prs, ds_warns) = initDs us1 nullIdEnv module_and_group
+ (dsMonoBinds opt_SccProfilingOn recursive all_binds [])
- final_binds
- = if (null core_clas_prs && null core_inst_prs && null core_const_prs) then
- -- we don't have to make the whole thing recursive
- core_clas_binds ++ core_val_binds
+ ds_binds = liftCoreBindings us2 [Rec core_prs]
+ in
- else -- gotta make it recursive (sigh)
- [CoRec (core_clas_prs ++ core_inst_prs ++ core_const_prs ++ core_val_pairs)]
+ -- Display any warnings
+ doIfSet (not (isEmptyBag ds_warns))
+ (printErrs (pprDsWarnings pprErrorsStyle ds_warns)) >>
- lift_final_binds = {-if switchIsOn sw_chkr GlasgowExts
- then-} liftCoreBindings us4 final_binds
- -- else final_binds
+ -- Lint result if necessary
+ lintCoreBindings "Desugarer" False ds_binds >>
- really_final_binds = if switchIsOn sw_chkr DoCoreLinting
- then lintCoreBindings PprDebug "Desugarer" False lift_final_binds
- else lift_final_binds
+ -- Dump output
+ dumpIfSet opt_D_dump_ds "Desugared:"
+ (pprCoreBindings pprDumpStyle ds_binds) >>
- shadows = shadows1 `unionBags` shadows2 `unionBags` shadows3 `unionBags` shadows4
- in
- (really_final_binds, shadows)
+ return ds_binds
\end{code}
projects / ghc-hetmet.git / blobdiff